    <SEC-DOCUMENT>0001564590-21-018252-index.html : 20210409
    <SEC-HEADER>0001564590-21-018252.hdr.sgml : 20210409
    <ACCEPTANCE-DATETIME>20210409092057
    ACCESSION NUMBER:		0001564590-21-018252
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		6
    CONFORMED PERIOD OF REPORT:	20210524
    FILED AS OF DATE:		20210409
    DATE AS OF CHANGE:		20210409

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			COASTAL FINANCIAL CORP
    		CENTRAL INDEX KEY:			0001437958
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			WA

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38589
    		FILM NUMBER:		21816674

    	BUSINESS ADDRESS:
    		STREET 1:		2817 COLBY AVENUE
    		CITY:			EVERETT
    		STATE:			WA
    		ZIP:			98201
    		BUSINESS PHONE:		425-257-1652

    	MAIL ADDRESS:
    		STREET 1:		2817 COLBY AVENUE
    		CITY:			EVERETT
    		STATE:			WA
    		ZIP:			98201
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>ck1437958-def14a_20210524.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: ck1437958-def14a_20210524.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>gr2tz0ed1bg1000001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: gr2tz0ed1bg1000001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>gr2tz0ed1bg1000002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: gr2tz0ed1bg1000002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>gr2tz0ed1bg1000003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: gr2tz0ed1bg1000003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>gr2tz0ed1bg1000004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: gr2tz0ed1bg1000004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>gr2tz0ed1bg1000005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: gr2tz0ed1bg1000005.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>